OpenCV - 图片二值化,计算白色像素点的个数

直接上代码吧:

import cv2
import numpy as np
from PIL import Image

area = 0
def getWhitePixel(img):
    global area
    image=cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
    blur = cv2.GaussianBlur(image,(5,5),0)
    ret3,th3 = cv2.threshold(blur,0,255,cv2.THRESH_BINARY+cv2.THRESH_OTSU)
    height, width = th3.shape
    for i in range(height):
        for j in range(width):
            if th3[i, j] == 255:
                area += 1
    return area